Rotary pump.



No. 886,110. PATENTED APR. 28, 1908.

R. O. BROMLEY. ROTARY PUMP.

APPLICATION FILED Bil (1.7, 1907.

ROBERT CAMPBELL BROMLEY, OF BEN AVON, PENNSYLVANIA.

ROTARY PUMP.

Specification of Letters Patent.

Patented April 28, 1908.

Application filed December 7, 1907. Serial No. 405,603.

, siding at Ben Avon, in the county of Alle-- gheny and State of Pennsylvania, have in vented certain new and useful Im rovements 1n Rotary Pumps, of which the f0 lowing is a specification, reference being had therein to t e accompanying drawing.

My invention refers to im rovements in pumps, particularly to the c ass of rotary pumps, and consists of an i111 rovement m 1)1111138 of this type adapted or use alteror motor, the improve natey as a pum ments particular y consisting in the construction of the rotating head and its parts.

.i'enerally stated, the pump comprises an outer casing or cylinder having an internal chamber, one portion of which iseccentric to the shaft center, provided with inlet and outlet openings, and a rotating drum or head tl'icrein having vanes adapted to travel radially with relation to the head and to. provide abutments for forcing the fluid through the pump when-used as such, or for providing pressure areas when the device is used as a motor, said vanes being arranged to occupy the eccentrically arranged space within the chamber by outward travel and to recede tl'ierefro'm by inward travel.

A feature of improvement and advantage is in the construction of the vanes and their mounting on the head whereby to secure positive action independent of centrifugal force, and to overcome the back pressure of the water by providing a sliding seat upon which the vanes will always hear in all positions.

Referring to the drawings: Figure 1 is a side view, half in elevation and half in vertical section through the casing, showing the drum andits parts in elevation, partly broken away. Fig. 2 is a central vertical'sectional view indicated by the line H, II, of Fig. 1. Fig. 3 is a perspective detail View of one of the vane frames. Fig. 4 is a similar sectional view of one of the vanes.

2 represents the main body portion of the casing, of cylindrical form, having an inlet opening 3 and an outlet 0 ening 4, which openings are used alternate y when the device is used as a motor; that is to say, in such case 3 would be the outlet opening and 4 the inlet; The casing 2 is provlded with a suitable base 5 whereby it may be set on a foundation as shown or suspended from any supporting framework, if desired, and is closed at each end by cylinder heads 6, 6, having the usual glands and stuffing boxes 7, 7, in which is mounted shaft 8. The center of said shaft and its bearing preferably corresponds with the center of cylinder 2, which may be bored out to provide the eccentric enlar ement referred to, but ably bored to provide a seat for lining or bushing 9, in which is formed the eccentrically enlarged chamber 10. The walls of said eccentric chamber may be developed from a center-offset from the center of shaft 8 for the entire circumference, but are preferably in the form of anecce ntrically arranged enlargement of the IINLGI'IOI" drum cavity and 'rovided with a minor circumferential wal a, a, of say one-sixth 0f the comlete circumference and a major circumerential wall I), b, of say one-third the circumference, and of radii defined from the center of shaft 8. The intervening walls at each side of the center, a, b, and a, b, respectively, are defined from a center c eccentric to the center of shaft 8.

The advantage of the above described bushing 9 within the casing, is that while the vanes are under the load between the points I and F) of the major circumferential wall there is no movement, while the vanes are free of any load pressure while traversin the ath of the eccentric walls from a tob and to a respeq'tively. Also when the vanes are entirely'receded they Wlll be at rest from a to a before being again extended.

A particular advantage of incorporatlng the entire interior wall against which the vanes bear in making an entire revolution in one completely embracing bushing is that. the bushing can not only be made of a different metal from the casing 2, as of bronze,

an internal which is preferbut that all wear is thus confined to the Y desired, according to the size and conditionsof service for'which the pump is ntended. The vane seats 12 are located on one side of hollow segmental-shaped portions of the piston head intervening between the vanes, each vane seat having adjacent to it a generally segmental-shaped clearance opening within which are mounted the vane, its frame, and the several features of construction, said space being suitably designed to receive such parts. Each segmental-shaped portion of the head, upon one side of which is rovided the vane seat 12, is provided.

wit 1 an interior cavity 13, connecting through the radial vane-bearing wall 14 by one or more ports 15 with the vane-bearing face to the chamber 13. The object of this construction is that ample rovision is thus made for leakage backwan ly from under- .neath the vanes so that when they are under pressure they may solidly seat upon faces 12, thereby obviating any tendency of the pressure of the fluid to become effective underneath the vane tending to raise it from its seat.

16 is the vane, generally rectangular in f rm, of flat blade-shaped construction, slidably mounted on face 12 and preferably having at its under side a clearance cavity 17 within its surrounding smooth under bearing face, so as to insure erfect seating, and likewise providing ample opportunity for backward travel through port 15 of any excess pressure.

18 is the vane frame mounted by a bearin cross-bar 19 in suitable bearings 20 in the si e of each segmental extension of head 11 opposite face 12, the frame having a smooth curved bearing face 21 concentric with the center of bearing bar 19 and adapted to bear upon the outer face of the vane at all positrons. Each vane is provided with one or more abutments or pins 22, projecting outwardly from its upper face into a-receiving socket 23 of frame 18. Said frame is normally pressed outwardly by means of compression sprin 24 mounted at its inner end against a suitable bearing in the piston head, as by a stud 25, and hearing at its outer end against a similar abutment or bearing 26 on frame 18. By this construction vanes 16 will always be, projected outwardly independent of the centrifugal force so as to fill the eccentric working space, the vanes being receded b their contact with the receding inner wall too of bushing 9. It will be understood, however, that if desired, springs 24 may be dispensed with, as in lar e sizes or with pumps of hi h velocity, and t at the vanes will ordinariy travel outwardly by centrifugal action and will beheld to their seats by the frames entirely independent of the springs.

The operation of the device is as follows. Upon the piston head 11 being rotated by its shaft 8 in the direction of arrbw 1;, water passing inwardly through inlet 3 will be carried by each vane successively around through the eccentric cavity 10 and discharged outwardly through opening 4 and its connections, at a rate of travel depending on the speed of the pump. Backward pressure of the water against the vanes due to the weight of the column beyond the outlet 4, will bear equally a ainst the entire outer area of each vane anc will solidly seat it upon face 12 so that any tipping thereon or tendency to displace that portion of the vane extending beyond its supporting bearing, will be prevented, while the bracing effect of frame 18 will also serve to positively hold each vane to its seat. The same result is secured when the pump is used as a motor and the pressure is directed against the vanes inwardly through opening 4.

The advantages of the invention result from the positive seating of the vanes; the positive laterally-directed motion imparted to them by their spring-actuated frames, and the provision made for the prevention of back pressure underneath them.

The invention may be changed or varied by the skilled mechanic in various features or details, but all such changes are to be'considered as within the scope of the following claims:

What I claim is:

1. A ump having an interior chamber and an inlet and an outlet 0 ening, a rotatable piston head eccentrically mounted in said chamber and provided with radially arranged vanes, and co-actin vane frames bearing against the faces of the vanes to hold them to their seats, substantially as set forth.

2. A pump having an interior chamber and an inlet and an outlet 0 ening, arotatable piston head eccentrica lly mounted in said chamber and provided with radially arranged vane-bearin seats having sliding vanes, and pivotec vane frames having curved bearing faces operatively en aging the faces of the vanes at one side to old their other'sides against their seats, substantially as set forth.

3. A ump having an interior chamber and an inlet and an outlet opening, a rotatable piston head eecentrically mounted in said chamber and rovided with radiall arranged vane-bearing seats having sliding vanes, pivoted vane frames having curved bearing faces operatively enga ing the faces of the vanes at one side to hold their other sides against their seats, and means for projeeting the vanes outwardly, substantially as set forth. I

4. A ump having an interior chamber and an inlet and an outlet 0 ening, a rota-' table piston head eceentrica y mounted in said chamber and provided with radially arranged vane-bearing seats having sliding vanes, pivoted vane frames having curved bearing faces operatively engaging the faces of the vanes at one side to hold their other sides against their "seats, and springs arranged to )ress the vane frames outwardly, substantia y as set forth.

5. A pump having an interior chamber and an inlet and an outlet 0 ening, a rotatable piston head eccentrical y mounted in said chamber and )rovided with radially arranged vane seats iaving exhaust ports, and vanes slidingly mounted thereon, substantially as set forth.

ti. pumphaving an interior chamber and an inlet and an outlet 0 )ening, a rotatable piston head eccentrically mounted in said chamber and )rovidcd with radially arranged vane seats liaving exhaust ports, and vanes slidingly mounted thereon provided with cavities on their under sides, substantially as set forth.

7. A pump having an interior chamber and an nlet and an outlet opening, a retatable piston head eccentrically mounted in said chamber and provided with radially arranged vane seats, vanes slidingly mounted on said seats, )ivotally mounted vane frames having curved bearing faces operatively engaging the faces of the vanes at one side thereof, and means providing shifting engagement between the vanes and frames, substantially as set forth.

8. A pump having an interior chamber and an inlet and an outlet-o )eiiing, a rotatable piston head eecentrical y mounted in said chamber and provided with radially arranged vane seats, Van'es slidingly mounted on said seats, and pivotally mounted vane frames operatively engaging the vanes and having curved bearing faces adapted to hold the vanes to their seats, substantially as set fortlu 9. .ln a rotar pump, the eon'ibination with the rotatab e piston head having radially arranged vane seats, of vanes mounted thereon by their under sides, and pivotally mounted vane frames operatively engaging against the other side of the vanes, substantially as set forth it). In a rotary pump, the combination with the rotatable .piston head having radially arranged ported vane seats, of vanes mounted thereon by their under sides, and pivotally mounted vane frames operatively engaging against the other side of the vanes, substantially as set forth.

11. la a rotary pump, the combination with the rotatable piston head having radially arranged vane seats, of vanes mounted thereon by their under sides, pivotally mounted vane frames in operative engagement with the other side of the vanes, and springs arranged to press the frames and vanes outwardly, substantially as set forth.

12. In a rotary pump, the combination with the rotatable piston head having radially arranged vane seats, of vanes mounte(t thereon provided with studs, and pivotally mounted vane frames engaging said studs, substantially as set forth.

13. In a rotary pump, the combination with the rotatable piston head having radially arranged vane seats, of vanes mounted thereon provided with studs, and pivotally mounted vane frames engaging said studs.

and having curved faces arranged to bear against said vanes to hold them to their seats, substantially as set forth.

H. The combination of the casing having a cylindrical chamber, a bushing therein having an annular cccentrically arranged interior wall, inlet and outlet openings communicating through the casing with the bushing interior, a rotatable head and its shaft mounted in the casing concentric therewith, radially arranged vanes mounted in the rotatable head, and swinging frames having bearing faces operatively engaging against the faces of the vanes, substantially as set forth.

15. The combination of the casing having a cylindrical chamber, a bushing therein having an annular fecccntrically arranged interior wall, inlet and outlet openings communicating through the casing with the bushing interior, a rotatable head and its shaft mounted in the casing concentric therewith, radially arranged vanes mounted in the rotatable head, swinging frames having bearing faces operatively engaging against the faces of the vanes, and springs arranged to press the frames and vanes outwardly, substantially as set forth.

16. In a rotary )ump, the eomblnation with the cylindrical casing having concentric shaft bearings, of an annular bushing mounted within the casing having major and minor inner circumferential walls concentric with the bearing centers and intervening walls described from a center eccentric thereto, a rotatable piston head having a shaft mounted in said bearings and provided with radially arranged vanes, and (o-acting vane frames bearing against the faces of the vanes to hold them to their seats, substautiall y as set forth.

17. In a rotary ump,'the combination with the cylindrica casing having concentric shaft bearings, of an annular bushing mounted Within the casing having major and minor inner circumferential walls concentric with the bearing centers and intervening walls described from a center eccentric thereto, a rotatable pist'on head having a shaft mounted in said bearings and provided with radially arranged vanes, and co-acti'ng vane frames bearing against the faces of the vanes to hold them to their seats, the pump having means providing an inlet and outlet to the interior of the bushing, substantially as set forth.

18. In a rotary pump, the combination of a casing having shaft bearings at each end, an annular bushing Within the casing having a major and a minor inner circumferential vane bearing seats having sliding vanes and pivoted vane frames having curved bearing faces operatlvely engaging the faces of the vanes at one'side to hold their other faces against their seats, substantially as set forth.

In testimony whereof I allix my signaturein presence of two witnesses.

I tOlSElt'l CAMPBELL BRUMLHY.

\Vitnesses C. M. CLARKE, )nAs. S. LEPLEY. 

